chunk_info_iterator.h

// Copyright 2014 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
 
#ifndef PACKAGER_MEDIA_FORMATS_MP4_CHUNK_INFO_ITERATOR_H_
#define PACKAGER_MEDIA_FORMATS_MP4_CHUNK_INFO_ITERATOR_H_
 
#include <cstdint>
#include <vector>
 
#include <packager/macros/classes.h>
#include <packager/media/formats/mp4/box_definitions.h>
 
namespace shaka {
namespace media {
namespace mp4 {
 
class ChunkInfoIterator {
 public:
  explicit ChunkInfoIterator(const SampleToChunk& sample_to_chunk);
  ~ChunkInfoIterator();
 
  bool AdvanceChunk();
 
  bool AdvanceSample();
 
  bool IsValid() const;
 
  uint32_t current_chunk() const { return current_chunk_; }
 
  uint32_t samples_per_chunk() const { return iterator_->samples_per_chunk; }
 
  uint32_t sample_description_index() const {
    return iterator_->sample_description_index;
  }
 
  uint32_t NumSamples(uint32_t start_chunk, uint32_t end_chunk) const;
 
  uint32_t LastFirstChunk() const {
    return chunk_info_table_.empty() ? 0
                                     : chunk_info_table_.back().first_chunk;
  }
 
 private:
  uint32_t chunk_sample_index_;
  uint32_t current_chunk_;
  const std::vector<ChunkInfo>& chunk_info_table_;
  std::vector<ChunkInfo>::const_iterator iterator_;
 
  DISALLOW_COPY_AND_ASSIGN(ChunkInfoIterator);
};
 
}  // namespace mp4
}  // namespace media
}  // namespace shaka
 
#endif  // PACKAGER_MEDIA_FORMATS_MP4_CHUNK_INFO_ITERATOR_H_